/Engine/Source/Developer/AutomationDriver/Public/IDriverSequence.h
Queues a move of the cursor over the element, then a series of events to invoke mouse input for pressing the specified button. The button will not be released, nor will their be repeat button events issued for holding the button.
[IAsyncActionSequence](API\Developer\AutomationDriver\IAsyncActionSequence) & Press ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IElementLocator](API\Developer\AutomationDriver\IElementLocator), ESPMode::ThreadSafe > & ElementLocator, [EMouseButtons::Type](API\Runtime\ApplicationCore\GenericPlatform\EMouseButtons__Type) MouseButton )